Valley and range sequence-Southern Yuma County


The Valley and range sequence-Southern Yuma County is a 3-Valley sequence of NW–by–SE trending block faulted valleys and mountains. About eleven major mountain ranges connect to each other in four, (mostly parallel), mountain sequences.

This regional parallel valley-mountain sequence ends at the Gila River valley at the north; to the south, it extends to the Gran Desierto de Altar of northwestern Mexico; the sequence is a remnant of the Basin and Range system.

List of valleys

Table of mountain ranges

The three valleys lay mostly between these perimeter mountain sequences.

West Sequence
North
W-Central block E-Central block East Sequence
North
Gila River Valley Gila River Valley Gila River Valley Gila River Valley
Gila Mountains (Yuma County) Wellton Hills
and Baker Peaks
Mohawk Mountains Aztec Hills
Gila Mountains (Yuma County) Copper Mountains Mohawk Mountains Aguila Mountains
Tinajas Altas Mountains
and Butler Mountains)
W:Cabeza Prieta and Tule Mountains
E:Sierra Pinta
Bryan Mountains
and Antelope Hills
Granite Mountains (Arizona)
Tinajas Altas Mountains
and Butler Mountains)
W:Cabeza Prieta and Tule Mountains
E:Sierra Pinta
Bryan Mountains
and Antelope Hills
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West Sequence
South
W-Central block E-Central block East Sequence
South

See also

  • Fault-block mountain

External links

  • U.S. Bureau of Reclamation: Map of "Surface geology of the Lower Colorado River Planning Area" — Southwestern Arizona.
  • ADWR—Arizona Dept of Water Resources: Lower Colorado River Hydrology — with map

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